Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 2791
interventional 1862
Observational 777
Registry 152

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Device 443
Drug 431
Procedure 203
Other 181
Drug|placebo 171
Behavioral 146
Diagnostic Test 28
Device|Drug 24
Device|Procedure 22
Dietary Supplement|placebo 19
Dietary Supplement 18
Biological 15
Device|Other 14
Drug|Procedure 14
Drug|Other 13
Behavioral|Other 12
Radiation 12
Other|Procedure 11
Biological|placebo 10
Behavioral|Drug 6
Drug|Other|placebo 6
Behavioral|Procedure 4
Combination Product 4
Genetic 4
Other|placebo 3
Behavioral|Device 2
Behavioral|Drug|Other 2
Behavioral|Drug|Procedure 2
Biological|Other 2
Device|Drug|placebo 2
Device|Drug|Procedure 2
Device|placebo 2
Diagnostic Test|Other 2
Dietary Supplement|Drug 2
Drug|placebo|Procedure 2
placebo|Procedure 2
Procedure|Radiation 2
Behavioral|Biological|Drug 1
Behavioral|Dietary Supplement|Other 1
Behavioral|Drug|placebo 1
Behavioral|Genetic 1
Behavioral|Genetic|Other 1
Biological|Device|Other 1
Biological|Device|placebo 1
Biological|Other|placebo 1
Combination Product|Device 1
Combination Product|Drug|placebo 1
Device|Other|Procedure 1
Diagnostic Test|Genetic 1
Diagnostic Test|Procedure 1
Dietary Supplement|Drug|Other 1
Dietary Supplement|Drug|Other|Procedure 1
Dietary Supplement|Drug|placebo 1
Dietary Supplement|Other 1
Drug|Genetic 1
Drug|Genetic|Other 1
Drug|placebo|Radiation 1
Drug|Procedure|Radiation 1
Genetic|placebo 1
Other|Radiation 1
placebo 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 436
NA 133
China 124
Canada 98
Korea, Republic of 92
Germany 89
United Kingdom 78
Denmark 61
Brazil 46
France 46
Japan 46
Italy 44
Switzerland 42
Netherlands 33
Norway 26
Sweden 24
Greece 21
Poland 21
Russian Federation 19
Spain 17
Belgium 16
Finland 13
United States|Canada 13
India 12
Israel 10
Taiwan 9
Austria 8
Iran, Islamic Republic of 8
Australia 5
Egypt 5
Turkey 5
Croatia 4
Czech Republic 4
Hong Kong 4
Slovenia 4
Argentina 3
Belgium|Netherlands 3
Colombia 3
Indonesia 3
Lebanon 3
Pakistan 3
Portugal 3
Colombia|Italy 2
Denmark|Sweden 2
Ecuador 2
France|Germany 2
Hungary 2
Ireland 2
Italy|Switzerland 2
Jordan 2
Mexico 2
New Zealand 2
Romania 2
Thailand 2
United States|Australia 2
United States|Canada|Denmark 2
United States|Ireland|Netherlands|Sweden 2
United States|Japan 2
United States|New Zealand|Singapore 2
United States|United Kingdom 2
Argentina|Australia|Austria|Bahrain|Bangladesh|Belgium|Bulgaria|Czechia|Denmark|Estonia|France|Germany|Hungary|India|Israel|Italy|Japan|Korea, Republic of|Netherlands|North Macedonia|Poland|Saudi Arabia|Serbia|Singapore|Slovenia|Spain|Sweden|Switzerland|United Kingdom|Vietnam 1
Argentina|Australia|Austria|Belgium|Brazil|China|Denmark|France|Germany|Greece|Hungary|India|Israel|Italy|Latvia|Malaysia|Netherlands|Norway|Poland|Portugal|Russian Federation|South Africa|Spain|Switzerland|United Kingdom|Venezuela 1
Argentina|Austria|Belgium|Brazil|Denmark|France|Germany|Hungary|Italy|Latvia|Netherlands|Norway|Poland|Spain|Switzerland 1
Argentina|Belgium|Brazil|Hungary|Netherlands|Poland|Russian Federation|Spain 1
Australia|Austria|Belgium|Bulgaria|France|Hong Kong|Ireland|Italy|Korea, Republic of|Latvia|Lithuania|Malaysia|Netherlands|New Zealand|Norway|Poland|Singapore|Slovakia|Spain|Sweden|Switzerland|Thailand|United Kingdom 1
Australia|Belgium|Brazil|Denmark|France|Germany|Netherlands|Poland 1
Australia|Belgium|Brazil|Germany|Netherlands|New Zealand|Poland|Switzerland 1
Australia|Belgium|Denmark|France|Germany|Netherlands|New Zealand|Portugal|Switzerland|United Kingdom 1
Australia|Belgium|Denmark|France|Netherlands|New Zealand|Poland|Switzerland 1
Australia|Belgium|Denmark|France|New Zealand|Poland|Spain|Sweden|United Kingdom 1
Australia|Belgium|New Zealand 1
Australia|Brazil|Singapore 1
Australia|France|Netherlands|Sweden|United Kingdom 1
Australia|Latvia|New Zealand 1
Australia|Malaysia|New Zealand|Singapore 1
Australia|New Zealand|Singapore 1
Austria|Belgium|China|Germany|Hong Kong|Italy|Netherlands|Portugal|Singapore|Spain|Switzerland|Taiwan|United Kingdom 1
Austria|Belgium|Denmark|France|Germany|India|Italy|Netherlands|New Zealand|Poland|South Africa|Spain|Switzerland 1
Austria|Belgium|France|Germany|Netherlands|United Kingdom 1
Austria|Belgium|Germany|Netherlands|Poland|Spain|Sweden|Switzerland 1
Austria|Belgium|United States|Argentina|Australia|Brazil|Canada|China|Czechia|Denmark|Finland|France|Germany|Grenada|Hungary|Ireland|Israel|Italy|Korea, Republic of|Netherlands|New Zealand|Poland|Puerto Rico|Slovakia|South Africa|Spain|Sweden|Switzerland|United Kingdom 1
Austria|Czechia|Denmark|Germany|Hungary|Ireland|Italy|Latvia|Lithuania|Poland|Portugal|Romania|Serbia|Spain|United Kingdom 1
Austria|Denmark|France|Germany|Greece|Netherlands|Portugal|Spain 1
Austria|Denmark|Germany|Hungary|Switzerland 1
Austria|Denmark|Germany|Switzerland 1
Austria|France|Germany|Israel|Italy|Malaysia|Netherlands|Poland|Spain|Thailand|United Kingdom 1
Austria|France|Germany|Italy|Netherlands|Switzerland|United Kingdom 1
Austria|Germany|Israel|United Kingdom 1
Austria|Germany|Switzerland 1
Austria|Hungary 1
Austria|United States|Argentina|Australia|Belgium|Brazil|Bulgaria|Canada|Chile|China|Croatia|Czech Republic|Estonia|Finland|France|Germany|Greece|India|Ireland|Israel|Italy|Korea, Republic of|Latvia|Lithuania|Malaysia|Mexico|Netherlands|Poland|Romania|Russian Federation|Singapore|Slovakia|South Africa|Spain|Sweden|Switzerland|Turkey|United Kingdom 1
Belgium|Brazil 1
Belgium|Brazil|Czechia|Latvia|Macedonia, The Former Yugoslav Republic of|Netherlands|Poland|Spain|United Kingdom 1
Belgium|Brazil|Denmark|Germany|Netherlands|Singapore|Spain|Switzerland 1
Belgium|Brazil|Denmark|Germany|New Zealand|Poland 1
Belgium|Czech Republic|France|Germany|Netherlands|Spain|Sweden|United Kingdom 1
Belgium|Czechia|France|Germany|Netherlands|Sweden|Switzerland 1
Belgium|Denmark|Estonia|Finland|Germany|Ireland|Italy|Latvia|Netherlands|Norway|Poland|Sweden|United Kingdom 1
Belgium|Denmark|France|Germany|Italy|Netherlands|Spain|Sweden|United Kingdom 1
Belgium|Finland|Netherlands|Switzerland|United Kingdom 1
Belgium|France|Germany|Netherlands|Poland|Switzerland|United Kingdom 1
Belgium|France|Luxembourg|Netherlands 1
Belgium|France|Netherlands|New Zealand|Sweden|United Kingdom 1
Belgium|Germany 1
Belgium|Germany|Israel|Sweden 1
Belgium|Germany|Netherlands|Switzerland 1
Belgium|Germany|Netherlands|United Kingdom 1
Belgium|Italy 1
Belgium|Italy|Netherlands 1
Belgium|New Zealand 1
Belgium|United Kingdom 1
Brazil|Germany 1
Brazil|Greece|Poland|Spain|United States|Argentina|Australia|Bulgaria|Canada|China|Czechia|Denmark|Estonia|France|Germany|Hungary|Japan|Korea, Republic of|Latvia|Lithuania|Malaysia|Mexico|Netherlands|Portugal|Romania|Russian Federation|Slovakia|South Africa|Sweden|Turkey|Ukraine|United Kingdom 1
Brazil|Indonesia|Macedonia, The Former Yugoslav Republic of|Malaysia 1
Cameroon|Canada|Italy|Spain|United Kingdom| 1
Canada|Czech Republic|France|Poland|Romania|Russian Federation|Slovakia 1
Canada|New Zealand 1
Chile 1
China|Hong Kong 1
China|Korea, Republic of 1
Czechia 1
Czechia|Denmark|Germany|Switzerland 1
Czechia|Germany|Hungary|Netherlands|Norway|Poland|Singapore|Sweden 1
Czechia|United States|Australia|France|Germany|Hungary|New Zealand|Poland|Romania|United Kingdom 1
Denmark|Estonia|Finland|France|Norway|Spain|Sweden|United Kingdom 1
Denmark|Finland|Latvia|Sweden 1
Denmark|Finland|Sweden 1
Denmark|France|Germany|Italy|Japan|Lithuania|Netherlands|Poland|Spain|Sweden|Switzerland 1
Denmark|France|Germany|Italy|Latvia|Serbia|Spain|United Kingdom 1
Denmark|France|Germany|Netherlands 1
Denmark|Germany|Netherlands 1
Denmark|Italy|Japan|Netherlands|Spain|United Kingdom 1
Denmark|Latvia 1
Denmark|Netherlands|Spain 1
Denmark|Netherlands|Spain|Sweden 1
Denmark|Poland 1
Denmark|Spain 1
Finland|France|Germany|Italy|Netherlands|Poland|Spain|Switzerland|United Kingdom 1
France|Germany|Italy|Netherlands 1
France|Germany|Italy|Serbia|Spain 1
France|Germany|Italy|Spain|Switzerland 1
France|Germany|Netherlands 1
France|Netherlands|United Kingdom 1
Germany|Australia|Austria|Belgium|Brazil|Bulgaria|Canada|Denmark|France|Hungary|Italy|Netherlands|Poland|Portugal|Singapore|Spain|Switzerland|United Kingdom 1
Germany|Belgium 1
Germany|Italy|Jordan 1
Germany|Jordan|Spain 1
Germany|Latvia 1
Germany|Moldova, Republic of|Netherlands 1
Germany|Switzerland 1
Germany|United Kingdom 1
Greece|Hungary|Ireland|Poland|Portugal|Russian Federation|Slovakia|Switzerland| 1
Hong Kong|Taiwan 1
Ireland|Austria|Belgium|Canada|China|Czech Republic|France|Germany|Greece|India|Israel|Italy|Malaysia|Netherlands|New Zealand|Portugal|Singapore|South Africa|Spain|Sweden|Switzerland|Thailand|United Kingdom 1
Ireland|United Kingdom 1
Italy|Netherlands 1
Italy|Spain 1
Italy|United Kingdom 1
Japan|Philippines 1
Kazakhstan 1
Latvia 1
Lithuania 1
Malaysia 1
Netherlands|Russian Federation 1
Netherlands|Spain 1
Netherlands|Switzerland 1
Netherlands|United States|Argentina|Australia|Bulgaria|Canada|Czechia|Denmark|France|Germany|Hungary|Italy|Korea, Republic of|Poland|Russian Federation|Spain|Sweden|Taiwan|United Kingdom 1
Netherlands|United States|Australia|Czechia|Germany|Hungary|Italy 1
New Zealand|United States|Latvia|United Kingdom 1
Oman 1
Palestinian Territory, occupied 1
Poland|Argentina|Australia|Austria|Belgium|Brazil|Canada|China|Denmark|France|Germany|India|Israel|Italy|Japan|Malaysia|Netherlands|New Zealand|Singapore|South Africa|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
Poland|United Kingdom 1
Poland|United States|Australia|Canada|China|Czech Republic|Denmark|France|Hungary|Mexico|Netherlands|Spain|United Kingdom 1
Puerto Rico 1
Slovakia 1
South Africa 1
Spain|United States|Argentina|Australia|Bulgaria|Canada|Denmark|Estonia|France|Germany|Hungary|India|Netherlands|New Zealand|Pakistan|Romania 1
Spain|United States|Australia|Austria|Belgium|Canada|France|Germany|Ireland|Italy|Netherlands|South Africa|Switzerland|United Kingdom| 1
Sri Lanka 1
Trinidad and Tobago 1
Ukraine 1
United States|Argentina 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|China|Egypt|France|Germany|Hungary|India|Israel|Italy|Japan|Lithuania|Malaysia|Mexico|Netherlands|New Zealand|North Macedonia|Peru|Poland|Portugal|Romania|Russian Federation|Saudi Arabia|Serbia|Singapore|South Africa|Spain|Sweden|Switzerland|Taiwan|Thailand|United Kingdom 1
United States|Argentina|Australia|Belgium|Brazil|Canada|Chile|Czech Republic|France|India|Korea, Republic of|Mexico|Netherlands|Poland|Portugal|Russian Federation|Spain|Turkey 1
United States|Argentina|Australia|Belgium|Brazil|Canada|France|Hungary|Italy|Mexico|Netherlands|Poland|Russian Federation|Spain 1
United States|Argentina|Australia|Belgium|Canada|France|Germany|Hungary|Italy|Poland|Spain 1
United States|Argentina|Brazil|Canada|Finland 1
United States|Argentina|Peru|Puerto Rico 1
United States|Australia|Austria|Belgium|Canada|Denmark|Finland|France|Italy|Japan|Latvia|Netherlands|New Zealand|Poland|Singapore|Spain 1
United States|Australia|Austria|Belgium|Denmark|Finland|France|Germany|Japan|Latvia|Malaysia|Netherlands|New Zealand|Poland|Portugal|Singapore|United Kingdom 1
United States|Australia|Belgium|Canada|Czechia|Denmark|France|Hungary|Korea, Republic of|Lithuania|Netherlands|New Zealand|Norway|Serbia|Sweden|United Kingdom 1
United States|Australia|Belgium|Canada|Denmark|Germany|Hungary|Israel|Korea, Republic of|Netherlands|New Zealand|Spain|Switzerland 1
United States|Australia|Belgium|Canada|France|Italy|Netherlands|Poland|Spain 1
United States|Australia|Belgium|Canada|France|Italy|Netherlands|Spain 1
United States|Australia|Belgium|Denmark|France|Germany|Italy|Netherlands|New Zealand|Portugal|Spain|United Kingdom 1
United States|Australia|Belgium|Egypt|Finland|Germany|Italy|Japan|Korea, Republic of|Latvia|Netherlands|Portugal|Saudi Arabia|South Africa|Spain|Turkey|United Kingdom 1
United States|Australia|Belgium|France|Japan|Latvia|New Zealand 1
United States|Australia|Belgium|France|Japan|New Zealand 1
United States|Australia|Canada|China|New Zealand|Singapore|Taiwan 1
United States|Australia|Canada|Germany 1
United States|Australia|Canada|Singapore 1
United States|Australia|China|Italy|Japan|Korea, Republic of|New Zealand|Singapore|Taiwan 1
United States|Australia|Germany|New Zealand 1
United States|Australia|Malaysia|New Zealand 1
United States|Australia|New Zealand|Singapore 1
United States|Austria|Belgium|Canada|Germany|Switzerland 1
United States|Austria|Canada|China|Croatia|Germany|Italy|Japan|Korea, Republic of|Netherlands|Portugal|Serbia|Singapore 1
United States|Austria|Canada|Germany|Spain|United Kingdom 1
United States|Belarus|Bulgaria|Canada|Czech Republic|Georgia|Germany|Israel|Poland|Russian Federation|Serbia|Slovakia|Slovenia|Ukraine 1
United States|Belgium|Canada|Czechia|Denmark|France|Germany|Hungary|Italy|Netherlands|Serbia|Sweden|United Kingdom 1
United States|Belgium|Canada|Japan|Netherlands|Spain|Switzerland|United Kingdom 1
United States|Belgium|Canada|Netherlands|Poland|Spain 1
United States|Belgium|Denmark|Israel|Netherlands|South Africa|United Kingdom 1
United States|Belgium|France|Germany|Latvia|Netherlands|Spain 1
United States|Belgium|Germany|Italy|Japan|Netherlands|Spain|United Kingdom 1
United States|Belgium|Israel|Spain 1
United States|Brazil 1
United States|Brazil|Canada|Denmark|Germany|Japan|Netherlands|Singapore 1
United States|Brazil|Germany|Japan|Latvia|Sweden|Switzerland 1
United States|Brazil|India|Italy|Korea, Republic of|Poland 1
United States|Canada|China|Germany|India|Japan|Taiwan 1
United States|Canada|Czech Republic|Germany|Hungary|New Zealand|Norway|Slovakia|South Africa 1
United States|Canada|Czech Republic|Germany|South Africa|United Kingdom 1
United States|Canada|Denmark|Netherlands|Singapore|Sweden|United Kingdom 1
United States|Canada|Denmark|United Kingdom 1
United States|Canada|Finland|France|Germany|Netherlands 1
United States|Canada|Finland|Puerto Rico 1
United States|Canada|Germany|United Kingdom 1
United States|Canada|India 1
United States|Canada|Korea, Republic of|Mexico 1
United States|Colombia 1
United States|Colombia|Germany|Latvia|Netherlands 1
United States|Czechia|Netherlands|United Kingdom 1
United States|Denmark|Germany|Israel|Netherlands 1
United States|France|Germany|Israel 1
United States|France|Germany|Korea, Republic of|New Zealand|Switzerland|United Kingdom 1
United States|France|Germany|Netherlands 1
United States|France|Germany|United Kingdom 1
United States|Germany 1
United States|Germany|Ireland 1
United States|India 1
United States|Israel|Austria|Belgium|Canada|Czech Republic|France|Germany|Italy|Netherlands|Poland|Russian Federation|Spain|Sweden|United Kingdom 1
United States|Netherlands 1
United States|New Zealand|Singapore|Taiwan 1
United States|Puerto Rico 1
United States|Ukraine 1
Venezuela 1
Venezuela|United States|Argentina|Brazil|Chile|Colombia|Lithuania|Netherlands|Peru 1

Sites per Study

Site_count Study_Count
1 1312
2 110
3 49
4 35
5 35
6 26
7 14
8 14
9 16
10 17
11 9
12 18
13 13
14 8
15 13
16 9
17 12
18 6
19 4
20 6
21 1
23 5
24 3
25 8
26 3
27 6
28 7
29 3
30 3
32 2
33 3
34 4
35 2
36 2
37 2
38 2
39 3
41 3
44 1
45 1
46 3
48 2
49 1
50 3
51 3
52 3
53 1
54 1
56 1
58 2
59 1
60 1
61 1
62 3
64 1
65 2
69 1
73 1
74 1
81 1
82 1
86 2
89 1
90 1
92 2
93 1
95 1
102 1
110 1
112 1
119 1
120 1
121 1
122 1
124 1
126 1
128 1
130 1
133 1
135 1
138 1
144 1
147 1
150 1
154 1
177 1
188 1
195 2
218 1
241 1
256 1
314 1
320 1
471 1
578 1
1091 1

Phase

Phase Study_Count
N/A 891
Phase 4 417
Phase 3 227
Phase 2 173
Phase 1 67
Phase 2/Phase 3 47
Phase 1/Phase 2 30
Early Phase 1 10

Number of Arms

Number_of_Arms Count_of_Studies
1 331
2 1067
3 170
4 67
5 6
6 15
8 2
11 1
NA 203

Number of Updates

Count of Versions Count of Studies
1 162
2 289
3 272
4 237
5 182
6 162
7 128
8 82
9 70
10 47
11 25
12 36
13 22
14 25
15 13
16 19
17 11
18 9
19 6
20 5
21 7
22 6
23 4
24 2
25 1
26 4
27 1
28 2
29 4
30 1
32 4
34 1
35 1
36 2
37 1
38 1
40 1
44 1
45 1
54 1
56 1
57 2
60 2
67 1
71 1
73 1
77 1
79 1
80 1
88 1
97 1
98 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 9810 1700 5.770588
Contacts/Locations 4105 1409 2.913414
Recruitment Status 2546 1440 1.768056
Study Design 1867 1248 1.495994
None (earliest Version on record) 1862 1862 1.000000
Outcome Measures 1569 915 1.714754
Arms 1158 765 1.513726
Interventions 1158 765 1.513726
Sponsor/Collaborators 1147 764 1.501309
Study Description 986 627 1.572568
Eligibility 944 632 1.493671
Study Identification 940 633 1.484992
Oversight 637 540 1.179630
More Information 448 175 2.560000
References 419 291 1.439863
Conditions 357 297 1.202020
Results 295 295 1.000000
IPDSharing 195 180 1.083333
Baseline Characteristics 109 87 1.252874
Results Submission Events 94 94 1.000000
Reported Adverse Events 74 65 1.138462
Participant Flow 62 53 1.169811
Documents 58 49 1.183674
2020 Documents 1 1 1.000000
2020 Study Status 1 1 1.000000
Quality Control Review has not concludedReturned: April 13 1 1 1.000000
Quality Control Review has not concludedReturned: March 27 1 1 1.000000

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 20.00 1.0000 5.0000 10.0000 2.0000 18.0000 20.000 11.0000
1st Qu. 24.00 60.0000 15.5000 29.2500 35.0000 59.5000 100.000 62.0000
Median 39.00 137.0000 32.0000 56.5000 79.0000 120.0000 281.000 179.0000
Mean 45.20 573.4045 177.0299 115.5667 193.0643 292.9149 1244.472 870.4747
3rd Qu. 49.75 417.0000 64.0000 134.7500 150.0000 319.0000 769.250 634.5000
Max. 92.00 61301.0000 8400.0000 643.0000 10000.0000 3043.0000 25673.000 25682.0000

Trial Group Type

group_type Group_Count
Experimental 1541
Active Comparator 1091
Placebo Comparator 292
Other 225
No Intervention 220
NA 203
Sham Comparator 21

Intervention Model

intervention_model Study_Count
Parallel Assignment 1217
Single Group Assignment 450
Crossover Assignment 109
Factorial Assignment 45
NA 24
Sequential Assignment 17

Primary Purpose

primary_purpose Study_Count
Treatment 1151
Diagnostic 235
Prevention 210
Basic Science 71
Supportive Care 51
Health Services Research 47
Other 42
NA 38
Screening 15
Device Feasibility 1
Educational/Counseling/Training 1

Observational Studies

Studies by Country

Country Study_Count
United States 184
NA 124
Korea, Republic of 53
Germany 41
China 39
Canada 29
United Kingdom 28
France 18
Italy 18
Netherlands 17
Denmark 15
Switzerland 14
Japan 12
Brazil 11
Norway 11
Israel 10
Sweden 9
Finland 8
Poland 8
Austria 7
Greece 7
Singapore 7
Belgium 6
India 6
Russian Federation 6
Turkey 6
Egypt 4
Spain 4
United States|Canada 4
Croatia 3
Taiwan 3
Hong Kong 2
Iran, Islamic Republic of 2
Romania 2
United States|Denmark 2
Argentina|Belgium|Brazil|Denmark|Finland|France|Germany|Greece|Italy|Luxembourg|Mexico|Netherlands|Norway|Poland|Romania|Slovenia|Spain|Turkey|United Kingdom|Venezuela 1
Argentina|Norway 1
Australia 1
Austria|Bangladesh|Belarus|Brazil|Bulgaria|Chile|Czechia|Denmark|Egypt|Estonia|France|Georgia|Germany|Hungary|Indonesia|Ireland|Israel|Latvia|Lithuania|Malta|Mexico|Netherlands|Poland|Romania|Russian Federation|Serbia|Slovenia|Spain|Sweden|Taiwan|Ukraine|United Kingdom 1
Austria|Belgium|Bulgaria|Germany|Italy|Netherlands|Poland|Switzerland|United Kingdom 1
Austria|Belgium|Denmark|France|Germany|Hungary|Ireland|Italy|Netherlands|Spain|United Kingdom 1
Austria|Czechia|Denmark|France|Germany|Ireland|Jordan|Latvia|Lithuania|Morocco|Poland|Portugal|Russian Federation|Spain|Switzerland|United Kingdom 1
Austria|Germany 1
Bangladesh 1
Belgium|Bulgaria|Croatia|Czechia|Denmark|Finland|Germany|Greece|Hungary|Netherlands|Poland|Slovakia|Spain|Sweden|Switzerland|United Kingdom 1
Belgium|France 1
Belgium|France|Germany|Hungary|Ireland|Italy|Latvia|Poland|Spain|United Kingdom 1
Belgium|France|Germany|Italy|Switzerland 1
Belgium|Germany|Ireland|Italy|Switzerland 1
Belgium|Singapore 1
Belgium|Sweden|United Kingdom 1
Brazil|Germany|Italy|United Kingdom 1
Bulgaria 1
China|India|Korea, Republic of|Singapore 1
China|India|Malaysia|Sri Lanka|Vietnam 1
China|Korea, Republic of|Malaysia|Taiwan|Thailand 1
Denmark|France|Germany|Italy|Japan|Netherlands|United Kingdom 1
Denmark|Netherlands|New Zealand|Poland 1
Ecuador 1
Germany|Hungary 1
Germany|Italy|Portugal|Spain 1
Germany|Malaysia|Spain 1
Germany|Poland 1
Hungary 1
Pakistan 1
Paraguay 1
Portugal 1
Portugal|Spain 1
Qatar 1
Slovenia 1
Spain|Sweden 1
Spain|Switzerland|United Kingdom 1
Spain|United Kingdom 1
Trinidad and Tobago 1
United States|Austria|Belgium|Denmark|France|Germany|Italy|United Kingdom 1
United States|Austria|Canada|Egypt|Estonia|Germany|Greece|India|Italy|Japan|Netherlands|Portugal|Saudi Arabia|Spain|United Kingdom 1
United States|Austria|Canada|Germany|Italy|Korea, Republic of|Switzerland 1
United States|Belgium|Czech Republic|Netherlands|Sweden 1
United States|Belgium|Denmark|France|Germany|Italy|Netherlands|Poland|Spain|Sweden|Switzerland|United Kingdom 1
United States|Belgium|Denmark|Israel 1
United States|Belgium|France|Italy|Korea, Republic of|Netherlands|Portugal|Sweden|United Kingdom 1
United States|Belgium|France|Slovakia 1
United States|Bulgaria 1
United States|Canada|China|Italy|Japan|Korea, Republic of|Latvia|Netherlands 1
United States|Canada|Puerto Rico 1
United States|Canada|Switzerland 1
United States|Denmark|France|Italy|Latvia|Netherlands|Poland|United Kingdom 1
United States|France|Germany|Italy|Japan|Netherlands 1
United States|Germany|Japan|Netherlands|Spain|United Kingdom 1
United States|Italy|Latvia|Netherlands|Slovakia|United Kingdom 1
United States|Netherlands|United Kingdom 1
United States|Saudi Arabia 1

Sites per Study

Site_count Study_Count
1 597
2 37
3 15
4 13
5 11
6 10
7 3
8 7
9 6
10 8
11 4
12 3
13 3
14 1
15 2
16 2
17 1
18 3
19 3
20 4
21 1
22 1
23 4
24 3
25 1
26 1
28 2
29 3
33 2
34 1
35 1
37 1
38 1
40 3
41 1
42 2
43 1
44 1
47 1
50 2
58 1
68 1
69 1
71 1
81 1
82 1
90 1
107 1
183 1
257 1
411 1

Number of Updates

Count of Versions Count of Studies
1 122
2 133
3 159
4 95
5 71
6 46
7 29
8 21
9 28
10 10
11 9
12 9
13 8
14 5
15 5
16 4
17 2
18 3
19 3
21 1
22 2
23 1
24 2
26 1
28 1
29 1
31 1
32 1
36 1
63 1
106 1
124 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 3082 655 4.705343
Contacts/Locations 1033 481 2.147609
Recruitment Status 778 513 1.516569
None (earliest Version on record) 777 777 1.000000
Study Design 680 464 1.465517
Sponsor/Collaborators 386 288 1.340278
Study Description 345 220 1.568182
Eligibility 323 247 1.307692
Outcome Measures 319 241 1.323651
Study Identification 311 220 1.413636
Groups 184 138 1.333333
Interventions 184 138 1.333333
Oversight 163 151 1.079470
References 139 87 1.597701
Conditions 111 86 1.290698
IPDSharing 62 58 1.068966
More Information 41 20 2.050000
Results 36 36 1.000000
Results Submission Events 16 16 1.000000
Baseline Characteristics 14 11 1.272727
Reported Adverse Events 13 9 1.444444
Documents 9 9 1.000000
Participant Flow 9 7 1.285714

Enrollment Metrics

Measure Observational
Min 1.000
1st Qu 96.000
Median 300.000
Mean 6401.925
3rd Qu 1111.500
Max 1758584.000

Observation Model

observational_model Study_Count
Cohort 445
Case-Only 93
NA 86
Case-Control 44
Case Control 43
Other 43
Case-Crossover 7
Defined Population 4
Defined Population, Natural History 4
Ecologic or Community 4
Family-Based 2
Case Control, Natural History 1
Natural History 1

Time Perspective

time_perspective Study_Count
Prospective 534
Retrospective 99
Cross-Sectional 68
NA 53
Other 12
Longitudinal, Prospective 6
Cross-Sectional, Prospective 2
Cross-Sectional, Retrospective 1
Longitudinal, Retrospective 1
Longitudinal, Retrospective/Prospective 1

Registries

Studies by Country

Country Study_Count
China 18
Korea, Republic of 17
United States 15
Italy 13
Spain 9
Germany 8
Netherlands 7
Belgium 5
Japan 5
NA 5
Greece 4
Brazil 3
Russian Federation 3
France 2
Singapore 2
Switzerland 2
United Kingdom 2
Argentina|Armenia|Austria|Bangladesh|Belarus|Belgium|Brazil|Bulgaria|Chile|Colombia|Czechia|Egypt|Estonia|France|Georgia|Hungary|Iceland|India|Indonesia|Ireland|Israel|Japan|Jordan|Kazakhstan|Kuwait|Lebanon|Lithuania|Malaysia|Mexico|Morocco|Netherlands|North Macedonia|Oman|Poland|Portugal|Romania|Saudi Arabia|Serbia|Slovakia|South Africa|Spain|Sweden|Switzerland|Thailand|Tunisia|Ukraine|United Arab Emirates|United Kingdom|Uzbekistan|Vietnam 1
Australia|Germany|United Kingdom 1
Belgium|Canada|Germany|Japan|Singapore 1
Belgium|Hong Kong 1
Belgium|Netherlands 1
Canada 1
Denmark|Norway 1
Egypt 1
Finland 1
France|Germany|Italy|Spain 1
France|Germany|Switzerland 1
Germany|Austria|Ireland|Italy|Spain|Switzerland|Turkey|United Kingdom 1
Germany|Malaysia|Spain 1
India 1
Indonesia 1
Israel 1
Mexico 1
Netherlands|Poland|Spain|United Kingdom 1
Netherlands|Russian Federation 1
Norway 1
Poland 1
Portugal 1
Portugal|Spain 1
Sweden 1
Thailand 1
Tunisia 1
Turkey 1
United States|Argentina|Canada|India|Italy 1
United States|Canada|Egypt|Greece|Lebanon|Russian Federation 1
United States|Canada|Germany|Israel 1
United States|India|Singapore 1
United States|Israel 1

Sites per Study

Site_count Study_Count
1 92
2 6
3 5
4 8
5 2
6 3
7 5
8 1
9 2
11 2
13 1
14 2
15 1
16 3
17 1
18 1
19 1
20 1
21 1
22 1
24 1
26 2
31 1
36 2
37 2
44 1
48 1
52 1
54 1
462 1

Number of Updates

Count of Versions Count of Studies
1 22
2 33
3 29
4 17
5 15
6 12
7 5
8 3
9 5
10 1
11 3
12 2
13 1
15 1
18 2
50 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 520 130 4.000000
Contacts/Locations 282 99 2.848485
None (earliest Version on record) 152 152 1.000000
Recruitment Status 143 95 1.505263
Study Design 100 71 1.408451
Study Description 55 40 1.375000
Outcome Measures 50 41 1.219512
Oversight 40 37 1.081081
Study Identification 35 32 1.093750
Eligibility 31 26 1.192308
Sponsor/Collaborators 25 22 1.136364
References 23 12 1.916667
Groups 22 20 1.100000
Interventions 22 20 1.100000
Conditions 15 14 1.071429
IPDSharing 14 13 1.076923
Results 4 4 1.000000
Documents 3 2 1.500000
Results Submission Events 3 3 1.000000
Baseline Characteristics 1 1 1.000000
More Information 1 1 1.000000

Enrollment Metrics

Measure Registries
Min 28.00
1st Qu 300.00
Median 1000.00
Mean 91393.95
3rd Qu 2350.00
Max 7205000.00

Registry Model

observational_model Study_Count
Cohort 108
Case-Only 23
Other 14
Case-Control 6
Case-Crossover 1

Time Perspective

time_perspective Study_Count
Prospective 138
Other 6
Cross-Sectional 5
NA 2
Retrospective 1

Follow-up

target_duration Study_Count
5 Years 33
12 Months 24
1 Year 18
3 Years 13
2 Years 12
1 Day 11
10 Years 6
24 Months 6
1 Month 4
6 Months 4
18 Months 3
3 Days 3
9 Months 3
1 Week 2
3 Months 2
1095 Days 1
12 Weeks 1
17 Years 1
2 Days 1
30 Days 1
36 Months 1
7 Days 1
90 Days 1